Extractor



June 12, 1928.

L. A. CORKUM EXTRACTOR Filed Sept. 2, 1927 Patented June 12, 1928.

Ten ESTA LEAMAN A. CORKUM, F SOMEBVILLE,,{MASSACHUSETTS Application fi1ed.September2, 1 927 SerialNo.'2 17,077.

.My present invention relates to extractors, and more particularly to tools or devices for use in extracting such articles asgear keys,

from gears, pulleys,or the1-like,'especially in the larger sized keys, which are usually.

driven in under considerable pressure.

11) When it has become necessary to remove these keys, forirepair work or any other purpose, it has frequently beenfoun'd extremely difficult to dislodge the same. In actual practice, many methods are utilized, such as attempting to drive the keysout withsledges and coldchisels. Thisfrequently results in the destruction of the keys, which,in these larger sizes, are expensive. Also, a great length of time is required to remove keys by such methods, resulting in unnecessary delay,-. expense and a annoyance.

My present invention provides a device clearly 1llustrated,.and the outer ends of the which willreadily remove the most retrac wtory key, and Which will, remove it in such a way. asto preserve thelkey, enabling it to be used overand over again, my novel device notmaterially marringor injuring the keys .duringremoval. I

The present invention comprises a pair of pivotediarms, carryingrat one. enda pair of jaws adapted to engage and grip the pro- ,l p v I ;1;0. bear agamst the 1aws 9.

jecting end. of a.gzear key,,pulley key, wheel key orthe like. These jaws are somounted on the armssas to. provide the pointof great estpressure on the key nearestthe outerend of ,the vjaws, thus insuring constantly 1ncreasing pressure of ,the jaws on the key when removing same.

These and further features of the invention will behereinafter more fully described. Further features of the invention, details of construction, combinations and ,advan- 'tages, will lee-hereinafter more fully, pointed out and claimed. y zReferringto the drawings, illustrating a ,preferred embodiment of: the invention, i Fig. 1 is a plan: view, partly broken away, of the device ,and

Fig. Zis a longitudinal,sectionalview on' the line 2-2 oflFigzl.

As shown in the drawings, my present novel device comprises ,a substantially :.U-

shaped frame comprising an. end portion 1 and sidesEZ and 3. Thisiframe is,preferably formed of channel members and maybe made r us an integral mit. The pater ends of the thelike 5. A key 6 is illustrated, fitting in the keywayf inpthe shaft '8 on which the gear-5 is mounted. Thesekeys, particularly in the larger sizes, are quite expensive, and

heretofore, in, removing th'em,they "have frequently fvbeen irreparably damaged and incapable of, furthenuse; Also, it has been found thata great length of timeis required to remove these keys, particularly as- "they must bewedged 0r jammed'in in order to effect a tight holding of the gear or t-he like on the shaft. Coldchisels, hammers and thelike have been necessary to effect there- -moval of these keys, necessarily resulting in .jgreat damage'thereto.

InJny present devicel; provide a pair of jawsfi,9,secured to the ends ofarms 10,10, Zby set screws .11, 11, or other holdingide- .vices. The; jaws 9 are yoked at their inner sides tofitover the ends of the arms 10 as armslOpare so formed with respect to the against the jaws, the point of greatest pressurewill be at the point12, Where the arms The arms 10 are pivoted to, the yoked ends .of a crossbar 15 at16, 16,th e sides otthe arms, and the pivot point-s, being, carried within the channels of the sides'2 was, A

threaded stem 17- is ,fitted through, the end.

1 of the "frame, this stem havinga squared end 18 and a .nutf19is provided on the stem outside of theframe, a bearing washer 20 being interposed between the nut-.19 and end .1 ,oflthe frame. This threaded stem 17, exjtends into'the frameandthmugh the crossa fbar15 andhasahutfl21-on itsrinner end, a

recess 22 being provided in thecrossbar 15 .to ,provide for longitudinaladjustment or 1116. stem [17 by accommodating theifnut 21. Thesthrea'ded' portion .ofthegstem terminates before reaching the crossbar 15, and .inter- -110sedibetween the .end of the. thread and the crossbarla isaa"hearingwasherfib. IA yoked .crossearm 24; is threaded out-he stem 17 and the yokedendsrofthearmfl straddle the: ,arms 10.. flheifacegfQfibf the arm 24, which engage the'inner sides .o'fthearmslfl are' ,inelinedtmvardtharear at the, arms.

arms fi and; 3 are adapted to abut against "the hub tot a pulley, gear, wheelor The" operation: of lmy present: fiovelidevice issimple, and will bereadil} finderstbod, being described as follows: p

The devicel heifig dpplied "to' an article a jfrom which it is desired'to remove a ,k ey or the like, such as the key 6, and the ends of hear the ol terlends of the jaws, f gives the of greatest [pressure at this particular 1 ,tier ;,H h nQthe teeth have beenasunk into 5 "th'e keya sufii'eient dista'nee, rotation of the nlifi1fibid gn n o her in r umen y-e Thisarotation goi the hut 19;.xvill' cause; the eml18 rm he, threaded; .outr vardly through 1 11s1 1i; eser edmemes.ofnt igstem 17;

' 'tively extracting the :keyl6 from its m eye 7 Thisextracting/operation. will f not capse,materialfdamage Ito the key, but

pjeri n lts; th'er key to he used 'ioveriandtover I gage tation, effthei'sqnared end 18,0f the p "mo e opposite direetion will cause (it g 131 1124; to ride on the "stem 17; a "the crosshar 15,,plerm1tting the reoffthe jziwsi'Qffomt ti M e flpesitio ext'ractingfopeiation.

iprikirepe'titi n' of 5 to inf;qijstraetionjandf,operation," and yet whieh is efligient andpositiveij its extract E g, insuring e ote- 1grthgke s ihQaQshort so i mbf,-,ini y' liaped'se" s 1 6 he re t e the dimt gmwnarily and"; with greatest force, -against wat b me se; squa e d eases; and rotation is then. imparted to the fa Tot extdaetingoper ek tj and e avi-l being p by a,

fasfi ahbvelwdesciibed; is novel,' and 'I have therefore claimed the same broadly herein. M While I have necessarily described my preseht ifiventio'n somewhat in detail, it will be appreciated that I mayvary th e size, shape and arrangement of parts Wlthln reasonahlyj .wide limits "without departing from the spirit-oftheinvention;

I --"A -further advantage inthe construction cillustrated anddescribed herein is the fact that the jaws 9 are removableand replaceable. Thus, it anyof the teeth shouldclup ,or wear 01f, either or both of the'jaws. can

7 he readily removed and replaced, thusstill further increasing the dfiSirahility, efliciclicy,

ahd economy ofthecpresentgdeviceei Ev My,invention is further described andde fined in the foriri of cl'aiins as follows:

,1. ex't'ragtor. of the kind described, comprising a substantially U-sh'aped frame,

[said stem, a fpair ofarms pivoted to said crossbar, jaws on; one end of said arms, and a cross-armxthreaded on said stem and en- ,gaging' "said arms, saidQcross-arin" belng da tedQfQn. rotation of the stem, to move said jaws'to clampin position. a

' 2. An extractofo j th'e kind described, 7 comprising; a lsiihstantia'lly U-shaped frame,

to rotate said stemgacross-bar earriedby ifsaidfstem: apair for, arms pivoted to said cross-'arln threaded on said stein engagmg said arms, sald'cross armhelngadapted, flonrotatlon of the stem, to" move said aws to clamping positiomand means to move V said jawstowa extiactedf i A i p c v t extractorfo fi the kind described,

,comprising a; substantin 11y U-shaped frame,

rd and? from an artiele to he a threaded stem carried in said frame, means A to rotate said steln; a cross-bar carried by saidfstem; a pairgpf arms pivoted to said crossbaijjaws 0d one end of said arms; and a cross-arm threaded on said stemfalnd "engaging said arms, 'said' cross-arm having, inclined faces engagingth'e-inner sides of said arms and adapted; on rotation of the stem, to. more; towardthe router ends'lof said arms, separating said outer ends aws into, clamping position.

4. An extractor of marine: described;

a coin prising a substantially u shapecl frame, v athreaded stein carried in saidfrarneQmeanS to rotate said stem, a cross-bar carried 'by said stern, a paii-fof'arms pivoted lto said cross-bar, jaws on .one .endfof said arms, a i cross a'rn threadedon said stem and engagclinfed faces engaging the inl i en sides of said jarips 'and adapted; on. rotation of the stem,

, to movetoward the outerends of said arms,

separating said outer ends and bringing said crossbar, jaws on neend of said arms, a

athreadedste n carried in said frame,means point, to rotate sa d stem, a"cross-har carried by i a threaded stem carried in said frame, means and bl 'il lging' said ciined faces engaging the inner sides of said arms and adapted, on rotation of the stem, to move toward the outer ends of said arms, separating said outer ends and bringing said jaws into clamping position, the thread on said stem terminating before reaching said crossbar, a bearing member interposed between the end of the thread and said crossbar, and a nut on the inner end of said stem.

6. An extractor of the kind described, comprising a substantially U-shaped frame, a threaded stem carried in said frame, means to rotate said stem, a cross-bar carried by said stem, a pair of arms pivoted to said crossbar, jaws on one end of said arms, a cross-arm threaded on said stem and en gaging said arms, said cross-arm having inclined faces engaging the inner sides of said arms and adapted, on rotation of the stem, to move toward the outer ends of said arms, separating said outer ends and bringing said jaws into clamping position, the thread on said stem terminating before reaching said crossbar, a bearing member interposed between the end of the thread and said crossbar, and a. nut on the inner end of said stem, said crossbar having a recess to receive said nut and permit longitudinal adjustment of said stem.

7, An extractor of the kind described, comprising a substantially U-shaped frame, a threaded stem carried in said frame, means to rotate said stem, a cross-bar carried by said stem, a pair of arms pivoted to said crossbar, a removable jaw pivot-ally mounted on one end of each arm, and means to move said jaws to clamping position.

8. An extractor of the kind described, comprising a substantially U-shaped frame, a threaded stem carried in said frame, means to rotate said stem, a cross-bar carried by said stem, a pair of arms pivoted to said cross-bar, a removable jaw pivotally mounted on one end of each arm, and a crossarm threaded on said stem and engaging said arms, said cross-arm being adapted, on rotation of the stem, to move said jaws to clamping position.

9. An extractor of the kind described, comprising a substantially U-shaped frame, a threaded stem carried in said frame, means to rotate said stem, a cross-bar carried by said stem, a pair of arms pivoted to said cross-bar, a removable jaw pivotally mounted on one end of each arm, a cross-arm threaded on stem and engaging said arms, said crossarm being adapted, on rotation of the stem, to move said jaws to clamping po sition, and means to move said jaws toward and from an article to be extracted.

10. An extractor of the kind described, comprising a substantially U-shaped frame, a threaded stem carried in said frame, means to rotate said stem, a crossbar carried by said stem, a pair of arms pivoted to said cross-bar, a removable aw pivotally mounted on one end of each arm, a cross-arm threaded on said stemvand engaging said arms, said cross-arm having inclined faces engaging the inner sides of said arms and adapted, on rotation ofv the stem, to move toward the outer ends of said arms, separating said outer ends and bringing said jaws into clamping position, the thread on said stem terminating before reaching said crossbar, a bearing member interposed between the end of the thread and said cross-bar, and a nut on the inner end of said stem, said crossbar having a recess to receive said nut and permit longitudinal adjustment of said stem.

In testimony whereof, I have signed my name to this specification.

LEAMAN A CORKUM. 

